This week, the cast (and fans) ofHow I Met Your Motherprepared to say goodbye to the show after nine seasons, whileHouse of CardsandGame of Thronesfused intoHouse of Thrones.Arnold SchwarzeneggerandJimmy Fallonperformed a QVC skit together onThe Tonight Show, while over atLate ...

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This week, the cast (and fans) of How I Met Your Mother prepared to say goodbye to the show after nine seasons, while House of Cards and Game of Thrones fused into House of Thrones. Arnold Schwarzenegger and Jimmy Fallon performed a QVC skit together onThe Tonight Show, while over at Late Night, Seth Meyers staged a wine intervention forToday show co-hosts Kathie Lee Gifford and Hoda Kotb. Elsewhere, a grandfather learned about sexting and other modern tropes, and dogs were stunned by magic tricks. Check out those clips and more in our weekly roundup of the best online videos:

Photos: TV's most heartbreaking deaths

HIMYM Last Chapter: Josh Radnor, Jason Segel and the other stars of How I Met Your Mother reflect on the past nine seasons of the CBS comedy, and prepare to say goodbye to their characters for good on Monday's series finale.

Grandfather learns sexting: In the series "Young Old," Ethan Cole tries to explain concepts like "sexting" and "c---blocking" to his 89-year-old grandfather, with mixed results. (via Tubefilter)

House of Thrones: Set aside the fact that this House of Cards-Game of Thronesmashup is sponsored by Quiznos, and enjoy Frank Underwood's foray into the politics of Westeros.

Schwarzenegger's QVC: Did you know Arnold Schwarzenegger moonlights as a QVC host? Check out this video, in which the former governor encourages his co-host (Jimmy Fallon) to "Get to the Chopper."

Kathie Lee and Hoda's wine intervention: Anyone who's a regular viewer of theToday show's fourth hour knows that Kathie Lee and Hoda love their wine. But do they love it a little too much? Seth Meyers posed that very question when the two co-hosts stopped by Late Night this week.

Dog magic tricks: It turns out humans aren't the only ones who are delighted completely confused and horrified by magic tricks. In this video, magician Jose Ahonen made dog treats disappear before some canine audience members. The reactions are priceless.